Sound-box.



A. W. SCHWDT.

SOUND BOX.

APPLICATION FILED JUNE H. 1914.

Patenfed May 4, 1915,

CHWHDT w MM;

ANNIE W. SCHMIDT, OF OAKLAND, CALIFORNIA.

SOUND-B 0X.

Specification of Letters Patent.

rateaiee May a. rain.

Application filed June 1?, 1314. Serial No. erases.

invention is to provide a novel and improved device of this general character whereby the I same may be assembled and applied with convenience and facility and wherein the possibility of metallic vibration is substantially entirely eliminated.

Furthermore, it is an object of the invention to provide a device oi this general character including a jewel stylus and wherein such stylus may be applied to or removed from ope 'ative position with expediency and convenience.

The invention also has for its object to provide a device of this general character of a novel and improved construction wherein/ the same is maintained substantially against movement relatively to the traveling surface with which it coacts and wherein the stylus is operatively connected with a movable non-metallic mass which is substantially free of contactwith the remaining elements of the sound box.

It is also an object of the invention to provide anovel and improved device of the character set forth including an external ring through the manipulation of which the stylus may be adjusted relatively to the traveling surface with which it coacts.

I It is also an object of the invention to provide a device of this general hharacter of a novel and improved construction and whereby the diaphragm included therein is protected in such a manner as to reduce to a minimum the possibility of injury thereto.

Theinvention consists in the details of construction and in thecombination and arran ement oi'the several parts whereby ccrtaii, important advantages -are attained and the device is rendered simpler, less expensive and otherwise more convenient and advantageous for use, all as will he hereinafter more fully set forth The novel features of the invention will be carefully defined in the appended claims.

In order that my invention may be the. better understood 1 will now proceed to describe the same with reference to the accompanying drawings, wherein- Figure l is an elevational view of i sound box constructed in accordance with an embodiment of my invention, certain. of the interior parts being indicated by dotted lines for convenience of disclosure; Fig. 2 is a vertical sectional view taken through the device as illustrated in Fig. 1; Fig. 3 is a bottom plan view of the device as herein included; ll i g. i is view in perspective, de. tached, oi. the stylus arm herein included; and Fig. 5 is an enlarged vertical sectional view taken through the end of the stylus arm and illustrating in detail the mounting of the stylus therein.

i is disclosed in the accompanying drawings, i denotes a cylindrical casing provided at one of its ends with the laterally directed annular flange 2 to afford a means whereby the cover or cap 3 may be suitably anchored thereto, said cover or cap 3 being provided. with a mouth piece 4 of any ordinary or preferred configuration In close proximity to the flanged end of the cylindrical casing 1 and in predetermined spaced relation thereto is the inwardly disposed annular flange 5 serving as a support for the seat ring 6 on which is adapted to be rested the annular hollow tube 7 formed preferably of rubber, and on which the diaphragm 8 is adapted to be rested. and interposed between the diaphragm and. the cover 4, when in applied position is a second annular tubular member 9 also formed preferably of rubber. By this arrangement, it will be readily perceived that the diaphragm 8 will be edectively maintained in operative position and possibility of injury thereto.

Positioned within the casing l and capable of reciprocal movement therein is the piston 10 having an axial bore 11, for a purpose to be hereinafter more particularlyset forth. The piston lfi is of a diameter less than the interior diameter of the casing 1 so as to be free of contact therewith when in applied position, and I prefer that such pisso rotected a's to reduce tOa minimum the' ten 10 .be prdduced from a. non-metallic,

As herein disclosed, the piston 10 is guided in its movement through the medium of the screws 12 operatively engaged with the seat ring and the bottom cover 14 and disposed through suitable openings, provided in the piston. By this arrangement, 1t

will be perceived that the screws 14, in ad dition to affording a requisite guide forthe piston 10, afford an effective means for maintaming. the-bottom cover 14 and the seat rin Gin operative'assemblage.

e piston 10 is of a predeterminedlength less. than the length of the casing and to the under surface thereof at one side of the opening 11 therethrough is suitably affixed the saddle16, in'which'is pivotally mounted the rockarm 17, the tail whereof terminating below the opening 11 and having secured thereto a flexible member 18 which in turn is operatively engaged with the anchor member 19 carried by the diaphragm 8 at substantially its axial center. s herein disclosed, the arm 17 is provided at a predeterminedpoint intermediate its length with the opposed trunnions 20 adapted to snugly fit within the saddle 16 and through which.

the pintle or pin 21 is directed whereby it will be perceived that an operative engage ment of the arm with the saddle is produced in a convenient and effective manner.

The arm 17 is provided at its lower extremitywith an opening 22 in which is adapted to be set the jewel stylus 23, the projecting point whereof beingso shaped as to properly coact with the grooves of the-traveling-supporting surface with which it is adapted to coact, such traveling supporting surface being either in the nature of a cylinder or a disk, as I have found in practice that mysound box may be employed with equal facility with different forms of record. In order that the stylus may be held within the opening 22in such a manner as not to become loosened or be susceptible to any possible vibration, I have said opening threaded so that the tap 24: may be properly engaged therein and bear firmly against the st, lus, it being perceived that the lower portion of the opening 22 and the adjacent portion of the stylus are. so formed as to prevent the stylus from passing entirely therethrough and for limiting the degree of projection of the point of the stylus. It will also be observed that the bottom cover 14 is provided with a suit able opening 25 in order to permit the requisite projection of the stylus to properly engage its coacting traveling surface. 7

The casing 1 is provided with diametri cally opposed elongated slots or openings 1 29 disposed longitudinally or endwise of the casing so that an operative connection may I l I be had between the annular member or ring 27 loosely surrounding the casing and the within the casing, aicoverf ment withthe piston 10. 'By this arrangement, it will be readily perceived that the stylus 23 may be" retracted or projected, as the necessity may require, by imparting movement to the annular member 27, the downward movement of the piston being controlled by contact of the lowermost screws '28, with thelower ends of the slots 26.

By havingthe stylus arm 17 supported by the-movable piston, the casing 1 maybe substantially immovably supported, which. arrangement be especially advantageous.I

I have found in practice to From ,theforegoingdescription, it is thoughtto beobvious that a sound box constructed in accordance with my invention is of an'extremely simple and comparatively inexpensive nature-and is particularly well;

adapted for use by reason of the convenience and facility with which it may be assembled, and it will also be obvious that my invention is susceptible of some change and modification without material departure from the principles reason limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my. invention in practice. 7

I claim:

1. Asound box comprising a casing, a dia-.

phragm.positioned-therein, a piston within the casing, a stylus carried by the'piston, an operative. connection between the stylus and the. diaphragm, a member surrounding the casing and capable of movement relatively thereto, and an operative connection between the movable member and the piston.

and spirit thereof and for this do not wish to be understood" as 2. A device of the character described Y comprising a casing provided with elongated slots, a diaphragm positioned within the casing, a piston mounted within the casing, a stylus carried by the pistdn, an operative connection between the stylus and the dia phragm, a member surrounding the casing and capable of movement relatively thereto,

and a connection between the member and the piston disposed through the slotstof the casing.

A sound box comprising a casing, an inwardly disposed flange within the casing, a seat ring seated (tn the flange, a oovermemher for the casing, a diaphragm interposed between the scat ring and the cover, a piston I I the opposite end of the casing, a s ylus carried by'the piston, an operative connection between the stylus and the diaphragm: and guiding nneans for the piston connecting the second cover and the seat ring.

4. A'sound box comprls'ing a casing, an

inwardly disposed flange Within the casing, the second cover and the seet ing said 10 a seat ring seated on the flange, a cover guid ng means serving to inalnta n saui seemember for the caslng, a diaphragm inter- 0nd cover and said ring in operatlveposition.

posed between the seat ring and the cover, In testimony whereof I hereunto affix my piston Within the casing a cover for signature in the presence of two Witnesses.

the opposite end of the casing, a stylus ANNIE W. SCHMIDT. carried by the piston, an operative connee- Witnesses: tion between the stylus and the diaphragm, J. Lnwxs,

and guiding means for the piston connecting CATHERINE CALLAHAN. 

